Cable Sizing

Phase

Conductor

S_min = (√3 × ρ × L × I × 100) / (ΔV% × V)

Current

Voltage

Cable Length

Max Voltage Drop

Once the conductor cross-section is fixed, coordinate the upstream switchgear ratings and the feeding transformer. The links below jump to the matching ETS product ranges and the related fault-current calculator.

Product

LV Switchgear (Eclipse)

IEC 61439 low-voltage switchgear up to 6300 A — coordinate breaker frame size and busbar rating with the cable ampacity calculated here.

Product

MV Switchgear (Eclipse)

IEC 62271 metal-clad MV switchgear 12–36 kV — match feeder cable cross-section to the panel's continuous and short-time current ratings.

Calculator

Short-Circuit Calculator

Verify the prospective fault current at the cable termination so the chosen breaker and cable both withstand the duty.

Sizing Advisor

Loss & Efficiency

Cable Sizing

Specify the switchgear and transformer that match this cable

LV Switchgear (Eclipse)

MV Switchgear (Eclipse)

Short-Circuit Calculator